Suspicious MBR at sector 0, is there a way to fix it?

Solution 1:

That's a hybrid MBR. It's necessary to boot Windows in BIOS mode, but if you plan to install Windows 8 or 10 in EFI mode, you need to replace the hybrid MBR with a legal protective MBR. You can do this with my GPT fdisk (gdisk) program:

Launch gdisk on the disk (sudo gdisk /dev/disk0 in your case).
Type x to enter experts' mode.
Type n to create a new protective MBR.
Type 'w` to save your changes.
Type y to confirm that you want to save the changes.

Suspicious MBR at sector 0, is there a way to fix it?

Solution 1:

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